This doesn't seem to work for me either.
DSM shuts down, but the server didn't go off. I have to hold the power-button for a few seconds to turn it off.
Are you also running the newest XPEnology 5.2-5644?
No, I'm currently using the previous version (5.2-5592).
Okay, thank you. With 5.2-5592 it worked for me, too. With the New 5644 it works no longer.